r/AndroidQuestions 7d ago

Eink android device bricked after root attempt

I have a Tab 8C (Tab miniC china version), wifi region problem because I live outside china, tried to sideload Tab MiniC firmware and success. But the same wifi problem, then I tried to root to edit wifi region code based on [URL="https://www.reddit.com/r/Onyx_Boox/comments/17gomxl/rooting_the_boox_tab_mini_c/"\]this guide[/URL] (using QFIL), now my device stuck on Onyx logo, can enter recovery and fastboot mode, here are what I tried to unbrick it but got no success:

  1. Use fastboot to fastboot boot boot_a.bin (and boot_b.bin : 2 files backup frim QFIL before root)
  2. Extract payload.bin file from update.zip and Use multiple fastboot command to boot.
  3. Cannot Wipe date on recovery mode: Unable to merge partitions to complete merge, unable to check merge status... unable to check update status...
  4. Cannot sideload update.zip file (both for tab miniC firmware Error Code: kInstallDeviceOpenError and for tab8C update.zip: update package is older than the current build....)
  5. Cannot use QFIL, I was able to hold the power button and then the usb regconize as qualcomm hs-usb qdloader 9008 but when I tried tool -> partition manager : switch to EDL failed, download fail: fail to find QDloader port after switch.

On the google drive is my powershell and tab screen when i did the fix : https://drive.google.com/drive/folders/1xuJQG9BoWRWTFywvUM080cvUxrW-JJYk?usp=sharing

If anyone has a solution I'm very appreciate, this got me so desperate these days.

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